1994 Chevrolet Astro Owner's Manual - Page 126

Trailer Wiring Harness If you have the optional trailering package, your vehicle will have 7-wire a harness. The 7-wire harness is stored on the right side of the van near the rear wheel well. This harness has a 30 amp battery feed wire and no connector, and should be wired by a qualified service person, Attach the harness to the trailer, then tape or strap it to your vehicle's frame rail. Be sure you leave it loose enough so the wiring doesn't bend or break, but notso loose that it drags on the ground. The harness must be routedout of your vehicle between the rear and door the floor, with enoughof the harness left on both sides so that the trailer or the body won't pullit. Store theharness in its original place. Wrap the harness together andtie it neatly so it won't be damaged. 2-66